Machine for treating shoe welts



Feb. 9, 1937.

c. G. BRosTRoM 2,069,748 MACHNE FOR TREATING SHOE wELrs FiledMay 2o, 1955 "gully:

I ...man

- will!" Patented Feb. 9, i937 Loans PATENT 2,069,748 MAcnINi: non 'rnnATINo SHOE wEL'rs Application May 20, 1935, Serial No. 22,364

6 Claims.

This invention relates to machines for treating the welts of welt shoes to prepare them, for example, for the reception of adhesive for securing outsoles to the shoes. As herein illustrated the invention is embodied in a machine for roughing a surface of the welt and the adjacent trimmed edges of the inseamed materials of a welt shoe preparatory to coating those parts with cement for attaching an outsole to the shoe.

Such machines commonly employ a rotary roughing tool and a welt support arranged to support the work against the thrust of the tool, as well as to guide the shoe and aid the operator in controlling it so as to produce accurate roughing. A machine of this character is disclosed and claimed in United States Letters Patent No. 2,008,059, granted July 16, 1935, upon my cepending application Serial No. 602,467, filed April 1, 1932, and it is an important object of the present invention to provide an improved welt support for machines of that type, althoughV it should be understood that the invention is not limited to its application to the specific machine mentioned but is capable of embodiment in other machines wherein the work supporting requirements are similar.

In a welt roughing machine employing a rotary roughing tool, which ordinarily runs continuously, it isl necessary to withdraw the .welt support to a suicient distance from the periphery of the tool to permit the insertion of the work, which must then be brought into engagement with the tool by movement of the welt support toward the latter. A feature of the present invention consists in the combination with a rotary roughing tool of means for supporting the welt of the shoe against the thrust of the tool and means for moving the supporting means radially of the tool.

This movement of the welt support radially of the tool is advantageous in that it causes the welt of the shoe to be presented accurately to the tool in the best possible manner and the invention also includes provision for adjustment of the extent of this radial movement, to determine exactly the depth to which the material of the welt. shall be roughened.

It is very convenient for the operator to be able to change the position of the welt support in order to. enable him to hold the shoe at the angle which will best enable him torsee clearly how the work is progressing, and another feature of the invention consists in so mounting the welt support that it is readily adjustable in position circumferentially of the rotary roughing tool without disturbing any other adjustments. In the illustrated machine this is accomplished by mounting the welt support in a carrier block which is supportedrotatably upon a stationary sleeve surrounding the tool shaft. By securing the welt supportin a carrier slide guided in the block for movement transverse to the axis of the sleeve, the radial movability of the welt support is not disturbed by the circumferential adjustment which changes its angular position around the tool.

These and other features of the invention, relatingv to adjustments of the welt support around its own axis and also axially of the tool shaft, will best be understood and appreciated from reading the following detailed description of one embodiment of the invention in connection with the accompanying drawing, in which- Fig. 1 is an angular View of the head portion of a roughing machine equipped with a welt support embodying the invention;

Fig. 2 is a View in side elevation of a portionV of the welt-.supporting mechanism; and

Fig. 3 is a detail View illustrating the position of the work while it is being operated upon.

The illustrated embodiment of the invention is shown as applied to a machine having the gen.- eral structure of the machine disclosed in United States Letters Patent No. 1,989,078, granted J anuary 29, 1935, upon my application.

In the drawing, I9 indicates the machine head, which is supported upon a pedestal l2 and has a bearing It in which runs a shaft I6 upon the projecting end of which is mounted a roughing tool I8. The shaft iii is reduced in diameter and threaded at 29 for the adjusting nut 22 and the check nut 24 by which adjustments of the roughing tool may be made, as described in detail in my prior patent.

Upon the rods 2e, 28 which are secured in the machine head I!! in parallel relation to the tool shaft I6, is slidably mounted a bracket 3D which may be secured to the rod 28 by a set screw 32 at any desired position of adjustment. The sliding mounting of the bracket 39 upon the two rods 26, 23 permits the bracket to be adjusted longitudi.- nally of the too-l shaft IG but does not permit the bracket to rotate relatively to the shaft.

A normally stationary, horizontal, cylindrical sleeve 34, which is integral with the bracket 30, loosely surrounds the shaft i9, which rotates freely within the sleeve. A carrier block 36 is supported by the sleeve Si, the block being tted closely to the outside of the sleeve but being rotatablyadjustable upon the sleeve about the axis of the tool shaft l5. A set screw 38, threaded the cross slide 66, provides for locking the latter Awith the edge of itsrwelt through the block 3% and bearing upon the sleeve 34 permits the block to be secured firmly to the stationary sleeve in any desired position of angular adjustment about the axis of the tool shaft.

Mounted inthe block 36 'is a carrier slide 45 which is reciprocable, in guides 42 formed in the block 36', in a path transverse to the axis of the sleeve 34 and the shaft I6, and approximately tangential to the periphery of the tool I8, although at a substantial distance to one side thereof. Y y y Pivoted to a lug 44 projecting from the lower end of the carrier Slide 46 is a connecting link 46 which is also connected to a lever 48 movable about a pivot 5B mounted in the lower end of an arm 52 which projects downward from the carrier block 36. The lever 48 is connected at 54 to Ya rod 56 which extends downward to a manually operable treadle, not shown. A pull spring 58,

the lower end of which is connected to the lever' 48 and the upper end of which is secured to the arm 52, acts to move the slide 4D upward when it is not depressed-by pulling down upon the treadle rod 56.V

The upper limit of movement of the slide 40 is adjustably determined by` a stop screw 60 threaded through a bracketV 62 extending upward from the carriery block 36, Vthe adjustment or". the screw 60 being preserved by al lock nut 64.

Mounted in the lower portion of the slide 40 ing portion 68 notched to engage in an annular groove 10 formed in the shank of an adjusting screw 12 which is threaded into the slide'46. A.v

binding screw'14 which is movable in a transverse slotY I6 in the slide 46 and is threaded into in any position of transverse adjustment.

. Extending rearward from the cross slide 66 is a bracket 18 which ends in a split clamp 80 'arranged to be tightened by a screw 82 to hold iirmly in a horizontal position the cylindricalrshank 'portion 84 ofA a welt support 86. By loosening the screw 82 the welt support may be freed to permit it to be adjusted angularly about the axis of its shank portion 84 and longitudinally of its said shank portion, across the face of the roughing tool I8. The welt-supporting portion of theV member 86 is attened and made thin so that it can be inserted in the welt crease lof a shoe, as illustrated in Fig. 3, wherein 88Yindicates the welt, 9i! the upper, 92 the insole, and 94 the inseam of a shoe mounted upon a last 96. The work-engaging edge of the ilatten'ed Vwelt-.supporting member is roundedras shown in Fig. 1 to permit the shoeto be swung aroundand presented at any Vdesired. angle Vto the roughing tool.

Adjustably mounted upon the shank 34 of the welt support is a finger hold 98 Awhich is split and secured in the desired position byV a clamping .screw 66.

Y it will bo noted that my improved woit-supporting apparatus is so constructed and arranged that any adjustment of the welt-supporting adjusted angularly in a circular path around the .circumference of the roughing tool in order to enable the operator to hold the shoe at the angle 'which will best enable him to see clearly how the .work is progressing without disturbing any other adjustment. By adjustment or" the stopscrew 66 the limit to which the welt support may move transversely of the axis of the tool in pressing Ythe welt against the roughing tool can be exactly determined andthe depth of the roughing can thus be accurately controlled. By adjusting the.,

io f

also free to be moved longitudinally for a rough adjustment. Thewhole apparatus can be moved` longitudinally of the roughinsr tool shaft to the most advantageous position by loosening the set screw 32. Y

In use the operator'depresses the treadle rod 56, with the result that thewwelt support 86 isV moved radially away from *the tool I8 a suflicient distance to permit the welt to be inserted. Upon release of the treadle the spring 58 causes the work to be pressed against the continuously running roughing tool and the'roughing action proceeds as the welt of the shoe ismoved along over the welt support. Inasmuch as the line of. movement of i theV carrier slide 40 is approximately parallel to that radius of the roughing tool which passes through the welt support 86 the work is Y pressedV normally against the tool to permit Ythe tool to operate most advantageouslythereon.

Having described the invention, what is claimed as new and is desired ,to be secured by Letters y Patent of the United States is:

1. In amachine for roughing the welt oi welt shoe, the combination with arotary rough- L ling tool of means for supporting the welt of they shoe Yagainst the thrust of said tool, means tending to move the supporting means radially of the tool toward the tool, and manually operated 'means away being independently adjustable in position both radially and circumferentially of the tool, spring means for urging the welt support toward the tool, and manual Ymeansy for retracting the rsupport against the tension of the spring.

3. In a machine forjroughing the welt of. a welt shoe, the combination with a rotary roughing tool of a welt support Vadapted to enter the Vwelt crease of theshoe and support the welt ally, circumferentially and axially of the tool, spring meansfor urging the Welt support toward the tool, and manual means for retracting` the 1.

support against the tension of the spring.

4. In a machine for roughing the weltof a welt shoe, the combination with a rotary rough-V Y ing tool of a Welt support guided for movex'nentV A`65' Y radially of the tool, means foradjustably rlimiting movement of the welt support toward the tool, and manually operable means formoving said support away from the tool to permit the the supportand the Y Y Y insertion of the welt between tool; 'l Y Y 5, In a machine Afor treatingV the .welt ofV a weit Shoo, the combination with a rotary tool of Y Y avcarrier slide guided for movement in a path at oneV side of, and approximately tangential to, the

tool. and a welt support mountedin thesliderV and. disposed substantially in the radial line of the tool which is parallel to said path.

6. In a machine for treating the welt of a Welt shoe, the combination with a rotary tool of a Welt support having a straight cylindrical shank portion, a thin, attened end portion in line with said shank portion and presenting a Welt supporting surface facing the periphery of the tool, and a carrier in which said shank portion is mounted for rotary adjustment around its own axis to Vary the angle of the Welt supporting surface to the periphery of the tool With- 5 out bodily movement of the welt support. Y

CHARLES G. BROSTROM. 

